#console {
    width: 300px;
    height: 50px;
    line-height: 50px;
    margin: 0 auto;
    text-align: center;
}
#app {
    position: relative;
    width: 300px;
    margin: 0 auto;
    height: 600px;
    box-shadow: 0 0 20px #ddd;
    padding-top: 30px;
}
#app  .inner {
    height: 600px;
    overflow: auto;
}
#app .user-card {
    padding: 2rem;
    line-height: 30px;
    box-sizing: border-box;
    height: 150px;
}
#app .user-card:nth-child(2n + 1) {
    background: rgba(100, 100, 100, .2);
}
#app .ender {
    text-align: center;
    color: red;
}
#app .cate {
    position: absolute;
    top: 0;
    background-color: #fff;
    width: 100%;
}
#app .cate > a {
    float: left;
    line-height: 30px;
    padding: 0 1rem;
}
#app .cate > a.current {
    background: green;
}